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Affordable Care Act

The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

In 2025, about one in three ACA enrollees said they would be “very likely” to look for a lower-premium Marketplace plan If their premium payments doubled.

Cost Concerns and Coverage Changes: A Follow-Up Survey of ACA Marketplace Enrollees

Following the expiration of the enhanced premium tax credits for people with Affordable Care Act (ACA) Marketplace plans, a new KFF follow-up survey of the same Marketplace enrollees KFF surveyed in 2025 finds half (51%) of returning enrollees say their health care costs are “a lot higher” this year compared to last year, including four in 10 who specifically say their premiums are “a lot higher.”

new and noteworthy
POLLING

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.
DATA

Marketplace Enrollment is Down in 2026—But All of the Data Isn’t in Yet

ANALYSIS

Higher Premium Payments or Higher Deductibles: The ACA's Tradeoffs

QUIZ

Test Your Knowledge of the Affordable Care Act

ANALYSIS

Competition Increased in Individual Market But Fell in Fully Insured Group Markets

Timely insights and analysis from KFF staff

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  • Medicaid Expansion in Red States

    From Drew Altman

    In this column for The Wall Street Journal’s Think Tank, Drew Altman explains that Tennessee Gov. Bill Haslam's decision on Medicaid expansion via the Affordable Care Act is the latest sign of pragmatism slowly winning over ideology in red states.

  • Proposed Medicaid Expansion in Utah

    Fact Sheet

    This fact sheet provides a summary of the proposal to expand Medicaid in Utah. This has not been officially submitted to CMS and needs state legislative approval before it could be implemented.

  • Medical Debt Among Insured Consumers: The Role of Cost Sharing, Transparency, and Consumer Assistance

    Perspective

    This policy insight examines medical debt among insured consumers, exploring how high cost sharing in health insurance plans can contribute, and explaining how greater transparency could help consumers avoid some financial pitfalls. It also provides an update on provisions of the Affordable Care Act meant to increase health plan transparency and bolster consumer assistance.

  • New Policy Insight Examines Medical Debt Among Insured Consumers

    News Release

    In this new policy insight, Kaiser Family Foundation Senior Fellow Karen Pollitz explores how high cost sharing in health insurance plans can contribute to an individual’s medical debt, and explains how greater transparency in plan details could help consumers avoid some financial pitfalls.

  • Health Reform: How Will Medicaid Change? Tutorial

    Interactive

    This tutorial was produced for kaiserEDU.org, a Kaiser Family Foundation website that ceased production in September 2013. The kaiserEDU.org tutorials are no longer being updated but have been made available on kff.org due to demand by professors who are using the tutorials in class assignments. You may search for other tutorials to view on kff.org.

  • State Fiscal Conditions and Medicaid: 2014 Update

    Issue Brief

    This issue brief provides an overview of Medicaid financing, Medicaid’s role in state budgets, the relationship between Medicaid and the economy and how the ACA and the Medicaid expansion could affect state budgets.

  • How Will the Uninsured Fare Under the Affordable Care Act?

    Fact Sheet

    This report explains how the ACA expands coverage nationally, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people are eligible for Medicaid or financial assistance in the Marketplace. For states not expanding Medicaid, the report quantifies how many uninsured people fall into the “coverage gap,” meaning they will be ineligible for financial assistance in the Marketplace or for Medicaid in their state despite having an income below the federal poverty level.

  • How is the ACA Impacting Medicaid Enrollment?

    Issue Brief

    This issue brief provides an overview of new Medicaid enrollment data released by Centers for Medicare and Medicaid Services and its interpretation to assess the influence of the ACA on Medicaid enrollment.

  • Measuring Changes in Insurance Coverage Under the Affordable Care Act

    Issue Brief

    This data note discusses the details and timing of some of the private and federal surveys that will be used to look at how coverage has changed due to the Affordable Care Act. Different surveys offer different information and insight into coverage under the ACA, and we discuss the contributions and challenges in each type of effort.